package com.fds.system.config;

import com.github.xiaoymin.swaggerbootstrapui.annotations.EnableSwaggerBootstrapUI;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.ApiKey;
import springfox.documentation.service.SecurityScheme;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.Collections;

/**
 * @Author fds
 */
@Slf4j
@Configuration
@EnableSwagger2
@EnableSwaggerBootstrapUI
public class Swagger2Config implements WebMvcConfigurer {

    @Value("${swagger.base-package}")
    private String basePackage;

    @Autowired
    private SecurityProperties securityProperties;

    /**
     * 显示swagger-ui.html文档展示页，还必须注入swagger资源：
     *
     * @param registry
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("doc.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
    }

    /**
     * swagger2的配置文件，这里可以配置swagger2的一些基本的内容，比如扫描的包等等
     *
     * @return Docket
     */
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2).apiInfo(apiInfo()).select()
            // 此包路径下的类，才生成接口文档
            .apis(RequestHandlerSelectors.basePackage(basePackage))
            // 加了ApiOperation注解的类，才生成接口文档
            .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class)).paths(PathSelectors.any()).build()
            .securitySchemes(Collections.singletonList(securityScheme()));
    }

    /**
     * oauth2配置 需要增加swagger授权回调地址 http://localhost:8888/webjars/springfox-swagger-ui/o2c.html
     * 
     * @return
     */
    @Bean
    SecurityScheme securityScheme() {
        return new ApiKey(securityProperties.getTokenHeader(), securityProperties.getTokenHeader(), "header");
    }

    /**
     * api文档的详细信息函数,注意这里的注解引用的是哪个
     *
     * @return
     */
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
            // 大标题
            .title("后台服务API接口文档")
            // 版本号
            .version("1.0")
            // 描述
            .description("后台API接口")
            // 作者
            .contact("fds").license("The Apache License, Version 2.0")
            .licenseUrl("http://www.apache.org/licenses/LICENSE-2.0.html").build();
    }
}
